9583b399d8
In the standard, constraint satisfaction checking is done on the normalized form of a constraint. Clang instead substitutes on the non-normalized form, which causes us to report substitution failures in template arguments or concept ids, which is non-conforming but unavoidable without a parameter mapping This patch normalizes before satisfaction checking. However, we preserve concept-id nodes in the normalized form, solely for diagnostics purposes. This addresses #61811 and related concepts conformance bugs, ideally to make the remaining implementation of concept template parameters easier Fixes #135190 Fixes #61811 Co-authored-by: Younan Zhang <zyn7109@gmail.com>
C language Family Front-end
Welcome to Clang.
This is a compiler front-end for the C family of languages (C, C++ and Objective-C) which is built as part of the LLVM compiler infrastructure project.
Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer.
If you're interested in more (including how to build Clang) it is best to read the relevant websites. Here are some pointers:
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Information on Clang: http://clang.llvm.org/
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Building and using Clang: http://clang.llvm.org/get_started.html
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Clang Static Analyzer: http://clang-analyzer.llvm.org/
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Information on the LLVM project: http://llvm.org/
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If you have questions or comments about Clang, a great place to discuss them is on the Clang forums:
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If you find a bug in Clang, please file it in the LLVM bug tracker: